In reply to BStar:
Here's a ticklist of the best Pembroke routes in the HS - HVS bracket I compiled a while back, you won't go far wrong with any of these (be aware of range and bird restrictions on some routes though).
https://www.ukclimbing.com/logbook/set.php?id=1592
My suggestions for a first visit would be a day on the Sandstone near St. Davids,
Caerfai Bay has some pleasant warm ups for
Armorican (VS 4c) which is an uber classic (base tidal), could be combined with a quick hit on
Carreg-y-Barcud Area for the excellent
Metamorphosis (HS 4b).
Next day catch some Limestone at
Saddle Head lots of fun pitches there off the mid height ledge,
Sea Mist (HS 4a) is particularly good. Alongside there is the longer route
Blue Sky (VS 4b) which is mind blowing and at the easy end of VS, again the base is tidal (though you can ab in and start from higher ledges).
Less than 10 minutes walk away you could also take in the excellent
Myola (HS 4b) in the mouth of Huntsman's Leap, a really atmospheric pitch at the grade.
If you want a really relaxing day then the Giltar area near Tenby has some great routes like
Giltar Slab Route (S 4a) and
The Mark of the Arch (S 4a) (easy climbing, but tidal and requiring a little nous to rig a secure abseil).